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Finding the Fourth Proportional to 61,144.70, 91,733.04 and 21,172.01

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Solution

The fourth proportional to 61,144.70, 91,733.04 and 21,172.01 is: 31,763.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,144.70 : 91,733.04 = 21,172.01 : x
  2. Step 2: Convert to fraction form
    61,144.70/91,733.04 = 21,172.01/x
  3. Step 3: Cross multiply
    61,144.70x = 91,733.04 × 21,172.01
  4. Step 4: Simplify right side
    61,144.70x = 1,942,172,381.55
  5. Step 5: Solve for x
    x = 1,942,172,381.55/61,144.70
  6. Step 6: Final answer
    x = 31,763.55

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.